Spinal support cushion



FIG. 1 is a front and side perspective view of the spinal support cushion showing my new design;

FIG. 2 is a back and side perspective of the spinal support cushion;

FIG. 3 is a side view of the spinal support cushion; and

FIG. 4 is a top plan view thereof. 

The ornamental design for a spinal support cushion, as shown. 